FPTP rocks in that it delivers decisive coalition free victories most often.
True, and this is a strength of our current system, but so does the STV doesn't it? I'm no expert, but from what I've understood, the STV also delivers a clear winner, but that candidate better reflects the will of his constituents.

To be honest though, I'm not convinced that the STV would have much effect on our elections. The main weakness with the current system is the discrepancy between the popular vote and voting power in the commons. Replacing our current system with STV wouldn't address that, so I figure the results would be pretty much the same as with the simple FPTP system.